Most CPAs and solar developers miss the IRA bonus adder stack. Many projects claiming 30% ITC actually qualify for up to 50%+: +10% Energy Community +10% Domestic Content +10–20% Low-Income Example: $250K system → $125K credit (50%). Most tools still show 30%. This tool models the full stack correctly and generates a CPA-grade eligibility memo with statutory citations in seconds. Free to use.